The amount of freshwater on the planet has remained fairly constant over time, and has been continually recycled through the atmosphere as well through rivers, streams and lakes. This means that every day the competition for a clean supply of water for drinking, cooking, bathing, and sustaining life grows.
Water shortage is an in-comprehensive concept to a mass majority of the human population and a harsh reality for some. It is the result of environmental, political, economic, and social influence. Water is the one ingredient for the human body that should be made accessible to anyone, anywhere. However the reality is, water is being held as a currency and used for control over different regions.
Due to geography, climate, engineering, regulation, and competition for resources, some regions have plenty of freshwater, while others face drought and debilitating pollution.Clean water is either hard to come by or a commodity that requires laborious work or significant currency to obtain.
Fresh water makes up a very small fraction of all water on the planet. While nearly 70 percent of the world is covered by water, only 2.5 percent of it is fresh. The rest of the water is saline and ocean-based. Even then, just 1 percent of our freshwater is easily accessible, with much of it trapped in glaciers. In essence, only 0.007 percent of the planet’s water is available to its rapidly growing 6.8 billion people.
Source: http://www.worldwatercouncil.org/library/archives/water-crisis/